github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/plan/function/builtin/multi/current_timestamp.go (about)

     1  // Copyright 2021 - 2022 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package multi
    16  
    17  import (
    18  	"github.com/matrixorigin/matrixone/pkg/container/types"
    19  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    20  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    21  )
    22  
    23  // a general round method is needed for timestamp fsp
    24  func CurrentTimestamp(vectors []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    25  	resultPrecision := int32(6)
    26  	if len(vectors) == 1 {
    27  		resultPrecision = int32(vector.MustTCols[int64](vectors[0])[0])
    28  	}
    29  	resultType := types.Type{Oid: types.T_timestamp, Size: 8, Precision: resultPrecision}
    30  	resultVector := vector.NewConst(resultType, 1)
    31  	result := make([]types.Timestamp, 1)
    32  	result[0] = types.UnixNanoToTimestamp(proc.UnixTime)
    33  	vector.SetCol(resultVector, result)
    34  	return resultVector, nil
    35  }